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| 1 /* | |
| 2 * Copyright (c) 2014 The WebM project authors. All Rights Reserved. | |
| 3 * | |
| 4 * Use of this source code is governed by a BSD-style license | |
| 5 * that can be found in the LICENSE file in the root of the source | |
| 6 * tree. An additional intellectual property rights grant can be found | |
| 7 * in the file PATENTS. All contributing project authors may | |
| 8 * be found in the AUTHORS file in the root of the source tree. | |
| 9 */ | |
| 10 | |
| 11 #include <arm_neon.h> | |
| 12 | |
| 13 static const int16_t cospi8sqrt2minus1 = 20091; | |
| 14 static const int16_t sinpi8sqrt2 = 17734; | |
| 15 // because the lowest bit in 0x8a8c is 0, we can pre-shift this | |
| 16 | |
| 17 void idct_dequant_full_2x_neon( | |
| 18 int16_t *q, | |
| 19 int16_t *dq, | |
| 20 unsigned char *dst, | |
| 21 int stride) { | |
| 22 unsigned char *dst0, *dst1; | |
| 23 int32x2_t d28, d29, d30, d31; | |
| 24 int16x8_t q0, q1, q2, q3, q4, q5, q6, q7, q8, q9, q10, q11; | |
| 25 int16x8_t qEmpty = vdupq_n_s16(0); | |
| 26 int32x4x2_t q2tmp0, q2tmp1; | |
| 27 int16x8x2_t q2tmp2, q2tmp3; | |
| 28 int16x4_t dLow0, dLow1, dHigh0, dHigh1; | |
| 29 | |
| 30 d28 = d29 = d30 = d31 = vdup_n_s32(0); | |
| 31 | |
| 32 // load dq | |
| 33 q0 = vld1q_s16(dq); | |
| 34 dq += 8; | |
| 35 q1 = vld1q_s16(dq); | |
| 36 | |
| 37 // load q | |
| 38 q2 = vld1q_s16(q); | |
| 39 vst1q_s16(q, qEmpty); | |
| 40 q += 8; | |
| 41 q3 = vld1q_s16(q); | |
| 42 vst1q_s16(q, qEmpty); | |
| 43 q += 8; | |
| 44 q4 = vld1q_s16(q); | |
| 45 vst1q_s16(q, qEmpty); | |
| 46 q += 8; | |
| 47 q5 = vld1q_s16(q); | |
| 48 vst1q_s16(q, qEmpty); | |
| 49 | |
| 50 // load src from dst | |
| 51 dst0 = dst; | |
| 52 dst1 = dst + 4; | |
| 53 d28 = vld1_lane_s32((const int32_t *)dst0, d28, 0); | |
| 54 dst0 += stride; | |
| 55 d28 = vld1_lane_s32((const int32_t *)dst1, d28, 1); | |
| 56 dst1 += stride; | |
| 57 d29 = vld1_lane_s32((const int32_t *)dst0, d29, 0); | |
| 58 dst0 += stride; | |
| 59 d29 = vld1_lane_s32((const int32_t *)dst1, d29, 1); | |
| 60 dst1 += stride; | |
| 61 | |
| 62 d30 = vld1_lane_s32((const int32_t *)dst0, d30, 0); | |
| 63 dst0 += stride; | |
| 64 d30 = vld1_lane_s32((const int32_t *)dst1, d30, 1); | |
| 65 dst1 += stride; | |
| 66 d31 = vld1_lane_s32((const int32_t *)dst0, d31, 0); | |
| 67 d31 = vld1_lane_s32((const int32_t *)dst1, d31, 1); | |
| 68 | |
| 69 q2 = vmulq_s16(q2, q0); | |
| 70 q3 = vmulq_s16(q3, q1); | |
| 71 q4 = vmulq_s16(q4, q0); | |
| 72 q5 = vmulq_s16(q5, q1); | |
| 73 | |
| 74 // vswp | |
| 75 dLow0 = vget_low_s16(q2); | |
| 76 dHigh0 = vget_high_s16(q2); | |
| 77 dLow1 = vget_low_s16(q4); | |
| 78 dHigh1 = vget_high_s16(q4); | |
| 79 q2 = vcombine_s16(dLow0, dLow1); | |
| 80 q4 = vcombine_s16(dHigh0, dHigh1); | |
| 81 | |
| 82 dLow0 = vget_low_s16(q3); | |
| 83 dHigh0 = vget_high_s16(q3); | |
| 84 dLow1 = vget_low_s16(q5); | |
| 85 dHigh1 = vget_high_s16(q5); | |
| 86 q3 = vcombine_s16(dLow0, dLow1); | |
| 87 q5 = vcombine_s16(dHigh0, dHigh1); | |
| 88 | |
| 89 q6 = vqdmulhq_n_s16(q4, sinpi8sqrt2); | |
| 90 q7 = vqdmulhq_n_s16(q5, sinpi8sqrt2); | |
| 91 q8 = vqdmulhq_n_s16(q4, cospi8sqrt2minus1); | |
| 92 q9 = vqdmulhq_n_s16(q5, cospi8sqrt2minus1); | |
| 93 | |
| 94 q10 = vqaddq_s16(q2, q3); | |
| 95 q11 = vqsubq_s16(q2, q3); | |
| 96 | |
| 97 q8 = vshrq_n_s16(q8, 1); | |
| 98 q9 = vshrq_n_s16(q9, 1); | |
| 99 | |
| 100 q4 = vqaddq_s16(q4, q8); | |
| 101 q5 = vqaddq_s16(q5, q9); | |
| 102 | |
| 103 q2 = vqsubq_s16(q6, q5); | |
| 104 q3 = vqaddq_s16(q7, q4); | |
| 105 | |
| 106 q4 = vqaddq_s16(q10, q3); | |
| 107 q5 = vqaddq_s16(q11, q2); | |
| 108 q6 = vqsubq_s16(q11, q2); | |
| 109 q7 = vqsubq_s16(q10, q3); | |
| 110 | |
| 111 q2tmp0 = vtrnq_s32(vreinterpretq_s32_s16(q4), vreinterpretq_s32_s16(q6)); | |
| 112 q2tmp1 = vtrnq_s32(vreinterpretq_s32_s16(q5), vreinterpretq_s32_s16(q7)); | |
| 113 q2tmp2 = vtrnq_s16(vreinterpretq_s16_s32(q2tmp0.val[0]), | |
| 114 vreinterpretq_s16_s32(q2tmp1.val[0])); | |
| 115 q2tmp3 = vtrnq_s16(vreinterpretq_s16_s32(q2tmp0.val[1]), | |
| 116 vreinterpretq_s16_s32(q2tmp1.val[1])); | |
| 117 | |
| 118 // loop 2 | |
| 119 q8 = vqdmulhq_n_s16(q2tmp2.val[1], sinpi8sqrt2); | |
| 120 q9 = vqdmulhq_n_s16(q2tmp3.val[1], sinpi8sqrt2); | |
| 121 q10 = vqdmulhq_n_s16(q2tmp2.val[1], cospi8sqrt2minus1); | |
| 122 q11 = vqdmulhq_n_s16(q2tmp3.val[1], cospi8sqrt2minus1); | |
| 123 | |
| 124 q2 = vqaddq_s16(q2tmp2.val[0], q2tmp3.val[0]); | |
| 125 q3 = vqsubq_s16(q2tmp2.val[0], q2tmp3.val[0]); | |
| 126 | |
| 127 q10 = vshrq_n_s16(q10, 1); | |
| 128 q11 = vshrq_n_s16(q11, 1); | |
| 129 | |
| 130 q10 = vqaddq_s16(q2tmp2.val[1], q10); | |
| 131 q11 = vqaddq_s16(q2tmp3.val[1], q11); | |
| 132 | |
| 133 q8 = vqsubq_s16(q8, q11); | |
| 134 q9 = vqaddq_s16(q9, q10); | |
| 135 | |
| 136 q4 = vqaddq_s16(q2, q9); | |
| 137 q5 = vqaddq_s16(q3, q8); | |
| 138 q6 = vqsubq_s16(q3, q8); | |
| 139 q7 = vqsubq_s16(q2, q9); | |
| 140 | |
| 141 q4 = vrshrq_n_s16(q4, 3); | |
| 142 q5 = vrshrq_n_s16(q5, 3); | |
| 143 q6 = vrshrq_n_s16(q6, 3); | |
| 144 q7 = vrshrq_n_s16(q7, 3); | |
| 145 | |
| 146 q2tmp0 = vtrnq_s32(vreinterpretq_s32_s16(q4), vreinterpretq_s32_s16(q6)); | |
| 147 q2tmp1 = vtrnq_s32(vreinterpretq_s32_s16(q5), vreinterpretq_s32_s16(q7)); | |
| 148 q2tmp2 = vtrnq_s16(vreinterpretq_s16_s32(q2tmp0.val[0]), | |
| 149 vreinterpretq_s16_s32(q2tmp1.val[0])); | |
| 150 q2tmp3 = vtrnq_s16(vreinterpretq_s16_s32(q2tmp0.val[1]), | |
| 151 vreinterpretq_s16_s32(q2tmp1.val[1])); | |
| 152 | |
| 153 q4 = vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(q2tmp2.val[0]), | |
| 154 vreinterpret_u8_s32(d28))); | |
| 155 q5 = vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(q2tmp2.val[1]), | |
| 156 vreinterpret_u8_s32(d29))); | |
| 157 q6 = vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(q2tmp3.val[0]), | |
| 158 vreinterpret_u8_s32(d30))); | |
| 159 q7 = vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(q2tmp3.val[1]), | |
| 160 vreinterpret_u8_s32(d31))); | |
| 161 | |
| 162 d28 = vreinterpret_s32_u8(vqmovun_s16(q4)); | |
| 163 d29 = vreinterpret_s32_u8(vqmovun_s16(q5)); | |
| 164 d30 = vreinterpret_s32_u8(vqmovun_s16(q6)); | |
| 165 d31 = vreinterpret_s32_u8(vqmovun_s16(q7)); | |
| 166 | |
| 167 dst0 = dst; | |
| 168 dst1 = dst + 4; | |
| 169 vst1_lane_s32((int32_t *)dst0, d28, 0); | |
| 170 dst0 += stride; | |
| 171 vst1_lane_s32((int32_t *)dst1, d28, 1); | |
| 172 dst1 += stride; | |
| 173 vst1_lane_s32((int32_t *)dst0, d29, 0); | |
| 174 dst0 += stride; | |
| 175 vst1_lane_s32((int32_t *)dst1, d29, 1); | |
| 176 dst1 += stride; | |
| 177 | |
| 178 vst1_lane_s32((int32_t *)dst0, d30, 0); | |
| 179 dst0 += stride; | |
| 180 vst1_lane_s32((int32_t *)dst1, d30, 1); | |
| 181 dst1 += stride; | |
| 182 vst1_lane_s32((int32_t *)dst0, d31, 0); | |
| 183 vst1_lane_s32((int32_t *)dst1, d31, 1); | |
| 184 return; | |
| 185 } | |
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Chromium Code Reviews
Issue 290653003:
libvpx: Pull from upstream (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/deps/third_party/libvpx/